#include <iostream>
#include <cmath>
#include <stdio.h>
#define PI 3.14159
using namespace std;

int main() {
	const double pi = 3.14159;
	double s, c, r, d;
	cin >> r;
	d = 2 * r;
	c = pi * d;
	s = pi * pow(r, 2);
	printf("%.4f %.4f %.4f",d,c,s);
}